Re: [PATCH v5] erofs: add per-cpu threads for decompression as an option

[Eric Biggers]

Hi,

On Wed, Feb 08, 2023 at 05:33:22PM +0800, Gao Xiang wrote:
> From: Sandeep Dhavale <dhavale@xxxxxxxxxx>
> 
> Using per-cpu thread pool we can reduce the scheduling latency compared
> to workqueue implementation. With this patch scheduling latency and
> variation is reduced as per-cpu threads are high priority kthread_workers.
> 
> The results were evaluated on arm64 Android devices running 5.10 kernel.

I see that this patch was upstreamed.  Meanwhile, commit c25da5b7baf1d
("dm verity: stop using WQ_UNBOUND for verify_wq") was also upstreamed.

Why is this more complex solution better than simply removing WQ_UNBOUND?

- Eric